Add evals for generating deployment configs

[desertaxle]

Create a set of evals that validates that a Prefect MCP equipped agent can create Prefect deployment configs based on the description given by a user.

Scenarios should include deployments with:

• multiple schedules (interval, rrule, and cron)
• triggers
• custom job variables (custom image, environment variables)
• different code storage locations (GitHub, Docker image, S3)

[linear]

OSS-6999 Add evals for generating deployment configs